Improvement in check-valves



J. F. WHITNEY.

Cheek-Valve.

No, 200,678. Patented Feb. 26,1-878.

UNITED STATES PATENT CFFIGE.

JAMES F. WHITNEY, OF HARTFORD, CONNECTICUT.

IMPROVEMENT IN CHECK-VALVES.

Specification forming part of Letters Patent No. 200,678, dated February26, 1878 application filed January 7, 1878.

To all whom it may concern:

Be it known that I, JAMES F. WHITNEY, of Hartford, in the county ofHartford and State of Connecticut, have invented certain new and usefulImprovements in Check-Valves and I do hereby declare that the followingis a full, clear, and exact description thereof, whereby a personskilled in the art can -make and use the same, reference being had tothe accompanying drawing, and to the letters of reference markedthereon.

Like letters in the figures indicate the same parts.

My improvement relates more particularly to the class of valves known ascheck-valves; but it is also applicable to other forms of valves whereit is desirable to have a perfectly tight joint, so as to preventleakage through the valve-seat.

The object of my invention is to provide for the accurate fitting of thevalve-seat when the valve is originally constructed,and to permit of itsbeing readily refitted when it becomes worn, or from any other cause isnot perfectly tight.

My invention consists in the construction and arrangement of the severalparts, as will be hereinafter described.

In the accompanying drawing, Figure l is a longitudinal vertical sectionthrough the middle of my improved valve. Figs. 2, 3, 4, and 5 aredetails, which will be hereinafter described.

A is the shell which contains the valve. It is furnished with hollowscrew-threads at the ends, as shown in the drawing, for connecting itwith the pipes thrdugh which the water or other liquid is supposed topass. In this shell the valve-seat is formed at A. B is a cap, whichscrews into a socket in the top of A. This cap is removable, and closesan opening in the top of the shell A,'through which the parts of thevalve are inserted or removed. 0 is a clapper, forming the movable partof the valve. This is shown more particularly in Figs. 2 and 3, whichrepresent a front and side view of this part removed from the shell. Ithas projections D at the sides, on the top, which rest in sockets in theshell, so as to form a hingejoint. They are held in the sockets by thecap B when it is screwed into its seat. E is a rotating disk, (shownmore particularly in Figs. 4 and 5,) which represent a front and sideView of this part. This disk forms the part of the valve which restsdirectly upon the valve-seat. It is attached to the clapper O by meansof an axis, E, which passes through an opening in O, and is fitted insuch a manner as to turn easily upon this axis, when desired. Around thepart E is a groove, into which the end of a screw, F, enters, to preventthe parts E and C becoming separated, although it allows the disk E toturn freely. Upon the rear end of the axis E is a slot, G, for thepurpose of introducing a tool by which the disk E can be rotated andground onto the valve-seat.

By means of my invention the valve, when first made, can be ground andfitted perfectly after the parts are all in place by rotating the diskE, and thus insure a tight joint when the valve is closed; and also,when the valve-seat becomes worn so as to leak, the disk E can again beground into its place without removing any of the parts of the valvefrom the shell. The hinge-joint D is made with some play in the sockets,to allow of the disk E accommodating itself to a new bearing.

It is obvious that my improved valve can be arranged difi'erently in theshell A. It may be placed either vertically or horizontally; or it canbe in line with the inlet and outlet, as shown in the drawing; or it canbe placed in a position at right angles to this. In this latter case,instead of introducing a tool for rotating the disk E through one of theopenings for the pipe, a separate opening will have to be made in theside of the shell for the purpose. This will, in some cases, be anadvantage, as the shell would not have to be unscrewed from the pipe torefit the valve seat.

What I claim as my invention isl. The combination of the rotating disk Ewith the hinged clapper O, substantially as herein described.

2. The combination of the clapper U, the disk E, and the screw F,substantially as herein described.

JAMES F. WHITNEY.

Witnesses:

Trcao. G. ELLIs, JAMES E. ABBE.

